Electrical and Structural Properties of θ-type BEDT-TTF Organic Conductors under Uniaxial Strain(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• In order to investigate the relationships between crystal structures and electronic properties of θ-type BEDT-TTF organic conductors, electrical properties of θ-(BEDT-TTF)_2Ag(CN)_2 and θ-(BEDT-TTF)_2CsZn(SCN)_4 and crystal structures of θ-(BEDT-TTF)_2CsZn(SCN)_4 under uniaxial strain are investigated. The resistivity measurements for both salts under uniaxial strain show that the inter-columnar uniaxial strain preserves the metallic nature while the intra-columnar one induces an insulating behavior, which are reminiscent of the charge-ordered state of θ-(BEDT-TTF)_2RbZn(SCN)_4. Structure analyses of θ-(BEDT-TTF)_2CsZn(SCN)_4 under uniaxial strain indicate that the inter-columnar strain slightly increases the diagonal transfer integral but does not vary the vertical one, and the intra-columnar uniaxial strain largely increases the vertical transfer integral but does not change the diagonal one. Based on these experimental results, the key parameters to determine the electrical properties of θ-type BEDT-TTF salts are discussed. It is suggested that the transfer integral along the intra-columnar direction dominates the occurence of the charge-ordered state.

• 社団法人日本物理学会の論文
• 2006-04-15

著者

• KONDO Ryusuke

  Department of Basic Science, University of Tokyo

• KAGOSHIMA Seiichi

  Department of Basic Science, University of Tokyo

• MORI Takehiko

  Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Ins

• HOSHINO Hirotada

  Department of Organic and Polymeric Materials, Tokyo Institute of Technology

• Mori T

  Tokyo Inst. Technol. Tokyo Jpn

• Mori Takehiko

  Department Of Organic And Polymeric Materials Graduate School Of Science And Engineering Tokyo Insti

• 森 竜雄

  Nagoya Univ. Aichi Jpn

• Mori Tatsuo

  Department Of Electrical Engineering School Of Engineering Nagoya University

• Mori Tatsuo

  Ibaraki National College Of Technology

• Mori Tatsushi

  Department Of Electronics And Information Science Faculty Of Engineering And Design Kyoto Institute

• Kagoshima S

  Department Of Basic Science University Of Tokyo

• Kagoshima Seiichi

  Department Of Art And Science The University Of Tokyo

• MORI Hatsumi

  Institute for Solid State Physics, The University of Tokyo

• Hoshino Hirotada

  Department Of Organic And Polymeric Materials Graduate School Of Science And Engineering Tokyo Insut

• Hoshino Hirotada

  Department Of Organic And Polymeric Materials Tokyo Institute Of Technology

• Mori K

  Institute Of Material Science University Of Tsukuba

• Mori Takehiko

  Department Of Organic Materials Tokyo Institute Of Technology

• Sakaguchi K

  Institute For Protein Research Osaka University

• Mori Hatsumi

  Institute For Solid State Physics The University Of Tokyo

• Kondo R

  Department Of Basic Science University Of Tokyo

• Kondo Ryusuke

  Department Of Art And Science The University Of Tokyo

• HIGA Momoka

  Department of Basic Science, University of Tokyo

• Higa Momoka

  Department Of Basic Science University Of Tokyo

• Mori Takehiko

  Department Of Hematology Tokyo Women's Medical University

• MORI Takehiko

  Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Insutitute of Technology

• HOSHINO Hirotada

  Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Insutitute of Technology

• Mori Takehiko

  Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

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